Machine Design
In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.

Both A and B
None of these
Left hand
Right hand

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Machine Design
A bolt of uniform strength can be developed by

Keeping the core diameter smaller than the diameter of the unthreaded portion
Keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt
None of these
Keeping the nominal diameter of threads equal to the diameter of unthreaded portion of the bolt

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Machine Design
Stress concentration is caused due to

Variation in properties of material from point to point in a member
Abrupt change of section
Pitting at points or areas at which loads on a member are applied
All of these

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